1. Pamusoro pePCB: OSP, HASL, Lead-isina HASL, Immersion Tin, ENIG, Kunyudza Silver, Hard gold plating, Kuputira goridhe bhodhi rose, chigunwe chegoridhe, ENEPIG...

OSP: mutengo wakaderera, yakanaka solderability, yakaoma kuchengetedza mamiriro, nguva pfupi, tekinoroji yezvakatipoteredza, welding yakanaka, yakatsetseka…

HASL: kazhinji ndeye multilayers HDI PCB Samples (4 - 46 akaturikidzana), yakashandiswa neakawanda makuru ekutaurirana, makomputa, midziyo yekurapa uye mabhizinesi emuchadenga uye zvikamu zvekutsvagisa.

Chigunwe chegoridhe: ndiko kubatana pakati pememory slot uye memory chip, masaini ese anotumirwa nemunwe wegoridhe.

Chigunwe chegoridhe chine akati wandei egoridhe conductive contacts, anodaidzwa kuti "chigunwe chegoridhe" nekuda kwechiso chazvo-chakaputirwa negoridhe uye kurongeka kwavo semunwe.Chigunwe chegoridhe chaicho CHINOSHANDISA yakasarudzika nzira yekupfekedza copper cladding negoridhe, iyo inopikisa zvakanyanya kune oxidation uye inoitisa zvakanyanya.Asi mutengo wegoridhe unodhura, tin plating yazvino inoshandiswa kutsiva ndangariro zhinji.Kubva muzana remakore rapfuura 90s, zvinhu zvemarata zvakatanga kupararira, bhodhi reamai, ndangariro, uye vhidhiyo zvishandiso zvakaita se "chigunwe chegoridhe" chinowanzo shandiswa tin zvinhu, chete mamwe epamusoro-inoshanda sevha / nzvimbo yekushandira achabata nzvimbo kuti aenderere mberi. tsika yekushandisa goridhe yakaiswa, saka mutengo une zvishoma zvekudhura.

1. Sei kushandisamapuranga egoridhe?

Nekubatanidzwa kweIC yakakwira nepamusoro, IC tsoka dzinowedzera uye dzakanyanya kukora.Nepo vertical tin spraying process inonetsa kuridza yakanaka welding pad flat, izvo zvinounza kunetsa ku SMT mounting;Pamusoro pezvo, hupenyu hwesherufu hwemarata yekupfapfaidza ndiro ipfupi kwazvo.Zvisinei, ndiro yegoridhe inogadzirisa matambudziko aya:

1.) Yepamusoro-soro tekinoroji, kunyanya ye0603 uye 0402 yekupedzisira-diki tafura yekumisikidza, nekuti kupfava kwewelding pad kune hukama hwakananga nemhando yekudhindisa solder paste, kumashure kweiyo re-flow welding quality ine. Mhedzisiro inogadzirisa, saka, iyo ndiro yese goridhe plating mune yakanyanya density uye yekupedzisira-diki tafura gomo tekinoroji inowanzoonekwa.

2.) Muchikamu chebudiriro, pesvedzero yezvinhu zvakaita sekutenga zvinhu kazhinji haisi iyo bhodhi kune welding nekukasira, asi kazhinji inofanirwa kumirira mavhiki mashoma kana kunyange mwedzi isati yashandiswa, hupenyu hwesherufu hwegoridhe rakapetwa bhodhi hurefu kupfuura terne. simbi kakawanda, saka munhu wese anoda kutora.Kunze kwezvo, PCB yakanamirwa negoridhe mumadhigirii emutengo wenhanho yekuenzanisira ichienzaniswa nepewter plate

3.)

4.) Asi nekuwanda uye kuomarara wiring, upamhi hwemutsara, spacing yasvika 3-4MIL

Naizvozvo, zvinounza dambudziko rekupfupika kwewaya yegoridhe: nekuwedzera frequency yechiratidzo, pesvedzero yekutapurirana kwechiratidzo mumachira akawanda nekuda kwekuita kweganda kunowedzera kuoneka.

(skin effect : High frequency alternating current, current will tend to concentering on the surface of the wire flow. Maererano nekuverenga, kudzika kweganda kune chekuita ne frequency.)

1. Sei kushandisakunyudza goridhe PCB?

Pane humwe hunhu hwekunyudzwa kwegoridhe PCB kuratidza sepazasi:

1.) chimiro chekristaro chakaumbwa nekunyudza goridhe uye goridhe plating chakasiyana, ruvara rwekunyudza goridhe ruchave rwakanaka pane goridhe plating uye mutengi anogutsikana zvakanyanya.Ipapo kushushikana kwendiro yegoridhe yakanyura kuri nyore kudzora, izvo zvinonyanya kubatsira pakugadziriswa kwezvigadzirwa.Panguva imwe chete zvakare nekuti goridhe rakapfava kupfuura goridhe, saka goridhe ndiro usapfeke - inodzivirira goridhe chigunwe.

2.) Kunyudza Goridhe iri nyore kupinza pane goridhe yakanamirwa, uye haizokonzeri murombo welding uye zvichemo zvevatengi.

3.) iyo nickel yegoridhe inongowanikwa pane welding padhi pa ENIG PCB, iyo chiratidzo chekufambisa muganda mhedzisiro iri mumhangura yemhangura, iyo isingazokanganisa chiratidzo, zvakare usatungamirire pfupi-dunhu kune waya yegoridhe.Iyo soldermask padunhu yakanyatsobatanidzwa nemhangura yemhangura.

4.) Chimiro chekristaro chekunyudza goridhe chakaonda kupfuura goridhe, zvakaoma kugadzira oxidation.

5.) Hapazovi nemhedzisiro pakupatsanurwa kana muripo waitwa

6.) Kupfava uye hupenyu hwebasa hwendiro yegoridhe yakanaka seyendiro yegoridhe.

1. Kunyudzwa Goridhe VS Goridhe plating

Kune marudzi maviri egoridhe yekuisa tekinoroji: imwe ndeyemagetsi goridhe plating, imwe Immersion Goridhe

Pakugadzira goridhe, kushanda kwetini kunoderera zvakanyanya, uye kushanda kwegoridhe kuri nani;Kunze kwekunge mugadziri achida kusunga, kana ikozvino vagadziri vazhinji vanosarudza nzira yekunyura yegoridhe!

Kazhinji, kurapwa kwepamusoro kwePCB kunogona kukamurwa kuita mhando dzinotevera: goridhe plating (electroplating, kunyudza goridhe), sirivheri plating, OSP, HASL (ine uye isina mutobvu), ayo ari kunyanya eFR4 kana CEM-3 mahwendefa, pepa base. zvinhu uye rosin coating pamusoro kurapwa;Pamarata murombo (kudya tin murombo) ichi kana kubviswa paste vagadziri uye zvinhu processing zvikonzero.

Pane zvimwe zvikonzero zvePCB dambudziko:

1. Munguva yePCB inodhinda, kunyangwe paine mafuta anopinda firimu pamusoro pePAN, inogona kuvharira kuita kwerata;izvi zvinogona kusimbiswa ne solder float test

2. Kunyangwe iyo yekushongedza chinzvimbo chePAN inogona kusangana nezvinodiwa zvekugadzira, ndiko kuti, kana iyo welding pad inogona kugadzirwa kuti ive nechokwadi chekutsigirwa kwezvikamu.

3. Iyo welding pad haina kusvibiswa, iyo inogona kuyerwa nekusvibiswa kweion;t

Pamusoro pepamusoro:

Goridhe plating, inogona kuita PCB yekuchengetedza nguva yakareba, uye nekunze kwezvakatipoteredza tembiricha uye mwando shanduko idiki (ichienzaniswa nekumwe kurapwa kwepamusoro), kazhinji, inogona kuchengetwa kwerinenge gore;HASL kana kutungamira yemahara HASL yekumusoro kurapwa kwechipiri, OSP zvakare, maviri epamusoro kurapwa munzvimbo yekushisa uye humidity yekuchengetedza nguva yekuteerera kune yakawanda

Mumamiriro ezvinhu akajairwa, kurapwa kwesirivheri kwepamusoro kwakasiyana zvishoma, mutengo wakakwirawo, mamiriro ekuchengetedza ari kudiwa zvakanyanya, kukosha kwekushandisa pasina sulfur bepa kurongedza kugadzira!Uye chengeta kwemwedzi inenge mitatu!Pamatani maitiro, goridhe, OSP, tin spray inenge yakafanana, vagadziri vanonyanya kufunga nezvekuita kwemutengo!